Hannon P.I., of Jersey City, is offering a $1,000 reward for information that leads to the whereabouts of Shannan Gilbert, 24, who has been described as a prostitute working for an escort service when she went missing in May.

In a flier, Hannon P.I. says that "all information will be kept in strict confidence."

The flier asks anyone with information to call (201) 451-7700. No one could be reached at that number this afternoon.

Gilbert was reported last seen on May 1, when her driver said he dropped her off at the home of a "john" in Oak Beach, on Long Island.

The driver told The Jersey Journal he last saw her when she appeared delirious and ran from the client's home at about 4:45 in the morning.

A few days later the woman's boyfriend, who still lives in Jersey City, reported her missing to police.

At the time she went missing Gilbert hads been indicted on prostitution-related charges stemming from an arrest Hoboken in June 2009. She was believed to have played a role in an escort service that operated out of the Jersey City Heights.